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Round|Lab Grown|IGI

1.26ct J VS1 Round Lab Grown Diamond

ID • J/VS1 • IGI LG492122422

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492122422

Diamond specifications and retailer prices

From £528 GBP
As of November 5, 2026
Save £1,546 GBP (75%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,559 GBP at MOH London · As of October 27, 2026
View at MOH London

About this 1.26ct lab-grown round diamond

This 1.26ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG492122422 or 492122422. Listed at 12 retailers as of November 5, 2026, with a 293% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.26
Carat
J
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492122422
Dimensions7.07 × 7.09 × 4.16 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.07 mm7.09 mm1.26 ctJ / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492122422
Side View
Table 58.5%Crown 32.9°Girdle: THN-MEDPavilion 40.2°Culet: NoneDepth 58.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £3,559 GBP|Low: £528 GBP|High: £3,603 GBP|Avg: £1,568 GBP|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 4£528 GBP
Retailer 5£954 GBP
Retailer 9£1,068 GBP
Retailer 6£1,106 GBP
Retailer 8£1,106 GBP
Retailer 10£1,233 GBP
Retailer 11£1,520 GBP
Retailer 7£1,751 GBP
Retailer 2£2,035 GBP
Retailer 3£2,063 GBP
MOH London£3,559 GBP

20 data points across 11 retailers

12 retailers£528 GBP to £2,074 GBP

A
Cheapest Retailer
-
£528 GBP
B+
Retailer 2
-
£954 GBP
View
B+
Retailer 3
-
£1,038 GBP
View
B+
Retailer 4
-
£1,068 GBP
View
Final sale: no returns
B
Retailer 5
-
£1,106 GBP
View
Retailer 6
-
£1,106 GBP
View
Price last confirmed 25 days ago
B+
Retailer 7
-
£1,233 GBP
View
B
Retailer 8
-
£1,751 GBP
View
B
Retailer 9
-
£2,035 GBP
View
B
Retailer 10
-
£2,063 GBP
View
B
Retailer 11
-
£2,074 GBP
View
Most Expensive
MOH London
LG492122422 · Oct 27
£3,559 GBP
View
Price last confirmed 10 days ago
11 more retailers have this diamond
Prices start from £528 GBPSave up to £1,546 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.26ct Round
£528 GBP